Nebular Properties and the Origin of the Interstellar Medium in Elliptical Galaxies (Poster paper)

Theoretical arguments indicate that the ISM is inhomogeneous; Mathews estimated that the ~ 1M⊙ of metal ejected by each supernova event into the ISM is trapped locally within the hot bubbles. Since in elliptical galaxies, there is no overlapping of expanding supernova remnants after galactic wind period, it is expected that this inhomogeneity persists for a long time. The observations also suggests that the ISM of elliptical galaxies is inhomogeneous. Based on these arguments, we studied the evolution of the multiphase (inhomogeneous) ISM.

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Abundance ratios in stars vs. hot gas in elliptical galaxies

Proceedings of the International Astronomical Union ◽

10.1017/s1743921310009245 ◽

2009 ◽

Vol 5 (H15) ◽

pp. 281-281

Author(s):

Antonio Pipino

Keyword(s):

Interstellar Medium ◽

Chemical Evolution ◽

Elliptical Galaxies ◽

Evolution Model ◽

X Ray ◽

Galactic Wind ◽

Hot Gas ◽

Self Consistent ◽

Chemical Evolution Model ◽

Gas Properties

AbstractI present predictions from a chemical evolution model for a self-consistent study of optical (i.e., stellar) and X-ray (i.e., gas) properties of present-day elliptical galaxies. Detailed cooling and heating processes in the interstellar medium are taken into account and allow a reliable modelling of the SN-driven galactic wind. The model simultaneously reproduces the mass-metallicity, colour-magnitude, LX - LB and LX - T relations, and the observed trend of [Mg/Fe] with σ. The "iron discrepancy" can be solved by taking into account the dust presence.

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Hyperfine structure radio lines from hot ISM in elliptical galaxies

Proceedings of the International Astronomical Union ◽

10.1017/s174392131000921x ◽

2009 ◽

Vol 5 (H15) ◽

pp. 278-278

Author(s):

Dmitrijs Docenko ◽

Rashid A. Sunyaev

Keyword(s):

Interstellar Medium ◽

Hyperfine Structure ◽

Elliptical Galaxies ◽

Radio Lines

AbstractHyperfine structure (HFS) line of 14N VII ion with rest frequency of ν = 53.04 GHz should be detectable from the interstellar medium in some of the densest and coolest cores of elliptical galaxies at redshifts exceeding 0.15 or so.

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Suzaku observation of the metallicity in the interstellar medium of NGC 1316

Proceedings of the International Astronomical Union ◽

10.1017/s1743921310009294 ◽

2009 ◽

Vol 5 (H15) ◽

pp. 286-286

Author(s):

S. Konami ◽

K. Matsushita ◽

K. Sato ◽

R. Nagino ◽

N. Isobe ◽

...

Keyword(s):

Interstellar Medium ◽

Mass Loss ◽

Elliptical Galaxies ◽

Stellar Mass ◽

Metal Enrichment ◽

Abundance Pattern ◽

Type Ia ◽

History Of ◽

Metal Abundances ◽

Formation And Evolution

Metal abundances of the hot X-ray emitting interstellar medium (ISM) include important information to understand the history of star formation and evolution of galaxies. The metals are mainly synthesized by Type Ia (SNe Ia) and stellar mass loss in elliptical galaxies. The productions of stellar mass loss reflect stellar metallicity. SNe Ia mainly product Fe. Therefore, the abundance pattern of ISM can play key role to investigate the metal enrichment history.

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